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IAUC 5871: 1993aa; 1993ab; N Lup 1993

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                                                  Circular No. 5871
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505

     C. Pollas, Observatoire de la Cote d'Azur, reports his
discovery of a supernova of mag V = 17.5-18 located at R.A. =
23h00m46s.40, Decl. = -6 37'06".5 (equinox 1950.0).  SN 1993aa,
found on 0.9-m Schmidt telescope films taken Sept. 19.13 and 20.02
UT, is superimposed on the galaxy nucleus, the galaxy itself being
of mpg about 18 and rather blue on the Palomar Sky Survey.  No such
object appears at the position of the supernova on either the
Palomar Sky Survey or an R film taken on 1991 Sept. 20.  A nearby
star of mag about 15 is located at R.A. = 23h00m47s.23, Decl. =
-6 39'03".5.
     A. V. Filippenko and T. Matheson, University of California at
Berkeley, report that uncalibrated CCD spectra (range 310-1000 nm)
obtained on Sept. 25 UT with the Shane 3-m reflector at Lick
Observatory show that the supernova is of type Ia, probably about 1
month past maximum brightness.

SUPERNOVA 1993ab IN NGC 1164
     J. Mueller reports the discovery of a supernova (blue mag
about 18) located 17".5 east and 12" south of the nucleus of NGC
1164 (R.A. = 2h58m.7, Decl. = +42 24', equinox 1950.0).  The supernova
was found on a plate taken on Sept. 24 UT by J. D. Mendenhall
and Mueller with the 1.2-m Oschin Schmidt Telescope in the course
of the second Palomar Sky Survey.  A spectrogram obtained by S. G.
Djorgovski, J. D. Smith, and D. Thompson on Sept. 25 UT with the 5-
m Hale Telescope (+ 4-shooter + spectrograph) shows broad emission
lines and a blue continuum typical of a type-II supernova.  There
is a hint that the supernova might be increasing in brightness.

     T. Kato, Kyoto University, reports that a pre-discovery image
of N Lup 1993 has been found on Fujichrome P1600 photographs taken
by I. Okada, observing from the Yulara Resort, N.T., Australia;
Okada reports the following photographic magnitudes:  Sept. 15.051
UT, 7.7; 16.465, 7.9; 16.488, 8.0.
     Visual magnitude estimates:  Sept. 23.32 UT, 8.5 (A. F. Jones,
Nelson, New Zealand); 23.72, 8.8 (D. Overbeek, Edenvale, S. Africa).

1993 September 25              (5871)            Daniel W. E. Green

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